Structural principle of adhesion tester:

1. The main transmission part is composed of a handwheel, sprocket, and helical gear. When the handwheel is rotated, the worktable moves left and right, while the needle is drawing a circle.

2. The head section is composed of the following two components.

A、 Double headed square screws are used to adjust the head up and down.

B、 The lower dovetail plate is connected by a sliding dovetail and a screw with a hand drawn needle to adjust the drawing diameter.

3. The workbench is equipped with a movable half nut and screw connection at one end to drive the workbench to move forward and backward. There are four nuts and two pressure plates on the workbench for pressing and placing test pieces.

4. The machine base is used to support the workbench and tracing head.

Instructions for using the adhesion tester:

Prepare samples according to the prescribed requirements; Replace the steel needle with a new one as soon as it is used (the needle tip is about 3mm away from the workbench); Adjust the eccentric position of the needle tip according to the required diameter, and then tighten it with screws; Install the prepared sample with the coating facing up on the workbench and press it tightly with a pressure plate. Use a crocodile clip to clamp the insert and connect it to the piercing display circuit; Lift the movable half nut to move the workbench to the outer end; Close the power switch, close the motor switch, rotate the head to move the pressure rod and add weights until the piercing display light is on, and then lower the half open nut; Determine the test adhesion of the coating film based on the rolling line pattern.